20236293457 has 2 divisors, whose sum is σ = 20236293458. Its totient is φ = 20236293456.

The previous prime is 20236293443. The next prime is 20236293461. The reversal of 20236293457 is 75439263202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18762424576 + 1473868881 = 136976^2 + 38391^2 .

It is a cyclic number.

It is not a de Polignac number, because 20236293457 - 2¹¹ = 20236291409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20236293437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10118146728 + 10118146729.

It is an arithmetic number, because the mean of its divisors is an integer number (10118146729).

Almost surely, 2^20236293457 is an apocalyptic number.

It is an amenable number.

20236293457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20236293457 is an equidigital number, since it uses as much as digits as its factorization.

20236293457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 20236293457 in words is "twenty billion, two hundred thirty-six million, two hundred ninety-three thousand, four hundred fifty-seven".